Huygens’ wavelet

Huygens' principle, proposed by Christiaan Huygens in 1690, is a fundamental concept in physics used to understand wave propagation. It states that every point on a wave front acts as a source of new, independent wavelets. These wavelets expand outwards, and their combined envelope forms the new wave front at a later time.12

This principle is particularly useful for explaining phenomena like diffraction, where waves bend around obstacles or spread through openings. When a wave encounters an obstacle, some wavelets are cut off, allowing others to spread into the shadow region, creating a pattern of light and dark fringes. Huygens' principle helps visualize how light and sound waves travel and interact with their surroundings.341